涡轴/涡桨发动机压气机流动特点与发展趋势

Flow features and developing trends of compressor in turboshaft/turboprop engine

首先,介绍了涡轴/涡桨发动机的现状与发展历程以及涡轴/涡桨发动机压气机的主要结构形式与技术特点。其次,从压气机的内部流动特点角度,详细介绍了涡轴/涡桨发动机组合压气机中的轴流级相比大推力涡扇发动机轴流压气机的内部流动特点与流场改善措施,及涡轴/涡桨发动机普遍采用的离心压气机中离心叶轮和扩压器的内部流动及匹配的特点。然后,对涡轴/涡桨发动机压气机内部流动失稳和扩稳措施进行了分析。最后,对未来的涡轴/涡桨发动机压气机的发展趋势进行了展望。

First,this paper briefly introduces the present situation and development history of the turboshaft/turboprop engine,as well as the main structural forms and technical features of the compressor in the turboshaft/turboprop engine.Second,the axial compressor of the combined compression system in this type of aero engine is different from high thrust turbofan engine.The special inner flow features and improvement measures of the axial compressor in the turboshaft/turboprop engine are given.The inner flow features of the impeller and diffuser,which are the typical section of the centrifugal compressor,are also discussed.Then,the instability process and stall margin enhancement in the compressor of the turboshaft/turboprop engine is analyzed.The developing trends of the turboshaft/turboprop engine in the future are given.